package cn.itcast.bos.web.action.base;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Join;
import javax.persistence.criteria.JoinType;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.apache.commons.lang3.StringUtils;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Controller;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import cn.itcast.bos.domain.base.Courier;
import cn.itcast.bos.service.base.CourierService;

/**
 * 快递员处理数据访问的action类
 * 
 * @author 张立
 * @version 1.0 2017-9-4 20:38:35
 */
@ParentPackage("json-default")
@Namespace("/")
@Controller
@Scope("prototype")
public class CourierAction extends ActionSupport implements ModelDriven<Courier> {

	// 模型驱动
	private Courier courier = new Courier();

	@Override
	public Courier getModel() {
		return courier;
	}

	// 注入Service
	@Autowired
	private CourierService courierService;

	// 添加快递员方法
	@Action(value = "courier_save", results = {
			@Result(name = "success", location = "./pages/base/courier.html", type = "redirect") })
	public String save() {
		courierService.save(courier);
		return SUCCESS;
	}

	// 属性驱动接收客户端参数
	private int page;
	private int rows;

	public void setPage(int page) {
		this.page = page;
	}

	public void setRows(int rows) {
		this.rows = rows;
	}

	// 分页查询方法
	@Action(value = "courier_pageQuery", results = { @Result(name = "success", type = "json") })
	public String pageQuery() {
		// 封装pageable对象
		Pageable pageable = new PageRequest(page - 1, rows);
		// 调用业务层，返回page
		// 根据查询条件，构造Specificaton条件查询对象(类似hibernate的qbc查询)
		Specification<Courier> specification = new Specification<Courier>() {

			@Override
			public Predicate toPredicate(Root<Courier> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
				// 当前查询root根对象Courier
				List<Predicate> list = new ArrayList<Predicate>();
				// 单表查询(查询当前对象对应的数据表)
				if (StringUtils.isNoneBlank(courier.getCourierNum())) {
					// 进行快递员工号查询
					Predicate p1 = cb.equal(root.get("courierNum").as(String.class), courier.getCourierNum());
					list.add(p1);
				}
				if (StringUtils.isNotBlank(courier.getCompany())) {
					// 进行快递员公司查询(模糊)
					Predicate p2 = cb.like(root.get("company").as(String.class), "%"+courier.getCompany()+"%");
					list.add(p2);
				}
				if (StringUtils.isNotBlank(courier.getType())) {
					// 进行快递员类型的模糊查询
					Predicate p3 = cb.like(root.get("type").as(String.class), "%"+courier.getType()+"%");
					list.add(p3);
				}
				// 多表查询(查询当前对象关联对象对应的数据表)
				// 使用Courier(root),关联standard
				Join<Object, Object> standardRoot = root.join("standard", JoinType.INNER);
				if (courier.getStandard() != null && StringUtils.isNotBlank(courier.getStandard().getName())) {
					// 进行收派标准的名称模糊查询
					Predicate p4 = cb.like(root.get("standard").as(String.class), "%"+courier.getStandard()+"%");
					list.add(p4);
				}
				return cb.and(list.toArray(new Predicate[0]));
			}
		};
		// 调用业务层返回page
		Page<Courier> pageData = courierService.findPageData(specification, pageable);
		// 将page对象转化成datagrid需要格式
		Map<String, Object> result = new HashMap<String, Object>();
		result.put("total", pageData.getTotalElements());
		result.put("rows", pageData.getContent());
		// 将结果对象压入值栈顶部
		ActionContext.getContext().getValueStack().push(result);
		return SUCCESS;
	}
	// 属性驱动
	private String ids;
	public void setIds(String ids) {
		this.ids = ids;
	}
	// 作废快递员
	@Action(value="courier_delBatch",results={@Result(name="success",location="./pages/base/courier.html", type="redirect")})
	public String delBatch(){
		// 按，分割ids
		String[] idArray = ids.split(",");
		courierService.delBatch(idArray);
		return SUCCESS;
	}
}
